Reichstag dome, Berlin

The home of the German parliament, the Bundestag, crowned by a glass dome designed by Norman Foster when the building was restored in 1999. A spiral ramp winds up inside the dome, with views over the city and down into the debating chamber below, a symbol of open government. A free audio guide explains the sights as you walk.

Visits are free but must be booked online in advance with your name, and you need photo ID at the security check. Book a few days ahead, or more in summer. The rooftop restaurant is another way in.